v-intersection

---

a vue component for IntersectionObserver

一个 vue 的 IntersectionObserver 组件

support vue3.0

demo and document

demo and documment github page

demo and documment 国内

use

install :

npm install v-intersection --save

import:

vue 2.6.11

import Vue from 'vue'
import intersection from "v-intersection";
Vue.use(intersection);

vue 3.0

import intersection from "v-intersection";
createApp(App).use(intersection ).mount('#app')

use

vue directive

<div v-intersection="handler"></div>



<script>
export default {
  methods:{
	  handler(entries, observer, isIntersecting, ratio){

	  }
  }
};
</script>

options:

<div
  v-intersection="{handler:yourMehtod,
      options = {
        root: document.querySelector('#scrollArea'),
        rootMargin: '0px',
        threshold: [0,1]  
      }
  }"
>

</div>

more options info in MDN document

更多配置参数请见 MDN document

modifier

once
just run once ,and  IntersectionObserver.unobserve( target) 
只执行一次, 执行结束后 , IntersectionObserver.unobserve(target)
<div v-intersection.once="handler"></div>


quiet
don't handle  when binding directive 
在绑定指令时不触发, 
<div v-intersection.quiet="handler"></div>

disconect( )

<div v-intersection="handler" ref="mydom"></div>


<button @click="disconect">  disconect( )  </button>


<script>
export default {
  methods:{
	  handler(entries, observer, isIntersecting, ratio){
	  },
    disconect(){
      this.$refs.mydom._observe.observer.disconnect() 
    }
  }
};
</script>

unobserved ( )

<div v-intersection="handler" ref="mydom"></div>



<button @click="unobserved">  unobserved( )  </button>


<script>
export default {
  methods:{
    
	  handler(entries, observer, isIntersecting, ratio){
	  },
    
    unobserved(){
      var observer = new IntersectionObserver(callback);
			observer.observe(this.$ref.mydom)
    }
  }
};
</script>